I distinctly remember that I was sitting at my desk in 46 Hillhouse when it occurred to me that if ‘Oumuamua is partially composed of H2 ice, then its acceleration, and indeed its other odd properties could be explained.
That H2 acceleration idea and its later refinement (which wasn’t my idea) in which ‘Oumuamua’s acceleration was caused by radiolytically produced H2 in H2O ice, served as the catalyst for a number of criticisms.
